五稜郭[goryoukaku] five-sided fortification
五稜堡[goryouho] five-sided fort
三稜鏡[sanryoukyou] prism
山稜[sanryou] mountain ridge

稜線[ryousen] ridgeline
気骨稜稜[kikotsuryouryou] (a person with) strong moral fiber (backbone, determination)
三稜草[mikuri] branched bur-reed (Sparganium erectum)
稜角[ryoukaku] corner